The Celestionic Sector is located in the northern reaches of the Ultima Segmentum. This sector is not well known as it is highly unstable around it's borders due to the remnants of a warp storm conjured during the Horus Heresy. In the present day, this sector houses the Bullfrogs, Preachers, Celestial Hawks, and Blood Hammers Space Marine Chapters that protect it from the many foul powers that are constantly attempting to secure it's Forgeworlds and vast amounts of minerals. Among these powers are the Eldar, Orks, Necrons, Chaos, and several renegade Human empires.